Bob also tweeted: "Nobody wanted to design this last tour more than I did! I am sick about it. My professional and business commitments were just too great. There simply was not enough time to give this wonderful project the proper amount of care and attention it deserves.

"After all these years of collaborating, it is like turning down your own little sister, and how many guys have a little sister like Cher?"

Cher continued: "I tried to convince him to end with me, but he had many reasons a s 2 why he couldn't do it. 2 many obligations n ot enough time even 2 do 1.

"Thank God I have a lovely man & wonderful designer!! Hugh Durant. He is talented & brave. We will persevere."

Hugh worked with Bob and designed the dancers' costumes for Cher's previous farewell tour in 2002.